Sheet-register detector



' mmm Jim@ I J. R. BLAHNE ET AL SHEET REGISTER DETEcToR Filed Feb. 1, 1922 2 SheetsSheet 1 June 8 1926. y 1,587,501

" J. R. BLAINE Er AL SHEET REGISTER DETECTOR Filed Feb. 1, 1922 2 sheets-sheet 2 Patented June 8, 1926.

UNITED STATES PATENT oFFlcEL JOSEPH R. IBLAINE AND CARL HENDERSON, OF CHICAGO, ILLINOIS, ASSIGNORS T MIEHLE PRINTING PESS AND MANUFACTURING COMPANY, 0F CHICAGO, ILLI SHEET-REGISTER DETECTOR.

Appucauun mea rebrary 1, 1922. serial No. '533,376.y

This invention relates to printing presses, and more particularly to sheet register detector mechanism.

In the operation of a ,printing press it 1s 6 important that the press shall be tripped in case a sheet fed therethrough is not registered or not fed at all, and if the sheet is not in register it is convenient to know wherein the difficulty lies to facilitate a cor- 10. rection and thus insure proper register of succeeding sheets.

Accordingly, one object of this invention is to provide simple, improved and eiicient means for tripping the press under the conditions mentioned and for indicating where correction is necessary in the event of faulty registration.

Another object is to provide a sheet register detector adapted to meet all of the requirements for successful commercial press operation.

These and other objects are accomplished by means of the arrangement disclosed on the accompanying sheets of drawings, in

which- Figure 1 is a fragmentary side elevation of a printing press embodying our invention;

Figure 2 is an enlarged fragmentary side elevation of the registering mechanism including sheet detector means; and,

Figure 3 is a detail top plan view'of part of the trip control mechanism.

The various novel features of our invention will be apparent from the following description and drawings and will be particularly pointed out in the appended claims.

Referring to the drawings, it will be noted that the il-.vention is disclosed in connection with an offset type of printing press, including a frame 10 in which a plate .cylinder 11, blanket cylinder 12, impression cylinder 13 and register mechanism 14 are mounted. When we refer to tripping of the press in this specification We mean disassociating the cylinders in a manner such that a fed sheet will receive no impression. In this particular instance this result is accomplished by moving the blanket cylinder 12 out of engagement with the plate cylinder 11 and impression cylinder 13. All of the details of the mechanism for moving the blanket cylinder 12 out of engagement with the plate cylinder 11 and impression cylinder 13 are Sheets fed to the impression cylinder 13 are registered with respect thereto, while the grippers and their registering parts are in motion, in any suitable manner, such'as described in the BlaineA Patent No. 1,367,229, granted February 1, 1921.

Considering the present structure more specifically, the register mechanism includes a revolubly mounted arm 16 having a guide shoe 17 formed at the outer end thereof for guidably receiving a-sheet 18. It will be understood that there are a plurality of these revolubly mounted' arms 16 spaced apart, and to the outer end of each of said arms is secured a front guide 19. For the sheet 18 to be in proper register it must engage the front guide member 19 on each of the arms 16. Operatively associated with each of the front guide plates 19 is a detector finger 20 mounted on a support 21A and spring pressed by a spring 25 so that the finger 20 tends to be out `of engagement with its associated front guide 19, as shown in Figure 2 of the drawings. In order that the vsheet 18 may be in register, that is, in engagement with each of the front guides 19, it 1s necessary that the associated detector finger 20 be forced into a receiving groove 22 formed in the guide 19. For giving the sheet 18 its final movement into engagement with the front guide members 19 against the tension of the spring 25, any suitable mechanism may be provided, such as that shown in the Blaine Patent No. 1,367,229, granted February 1, 1921. As the dector fingers 20 are moved toward the associated front guides 19 an associated trip finger 23, secured to a bracket 24 carried on the shaft 21', is given a counterclockwise movement against the tension of the spring 25 normally holding the trip finger 23 in the position shown in Figure 2. If the sheet 18 is in proper register with the front guides 19, the hook 26 at one end of the trip linger 23 will escape a latch 27 during a counterclockwise rotative movement of the-arm 16 as viewed in Figure 2,

it being understood that the latch 27 is mounted in a bracket 28 pivotally mounted at 29 to a stationary member 30 having a stop member 31' cooperating with a nose 32 on bracket 28 for limiting pivotal movement of the latter in one direction. 'It is seen, therefore, that if the hook 26 escapes engagement with the latch 27, the tripping mechanism, to be described more in detail hereinafter, will not be caused to function in a manner to trip the press. However, if no'sheet is fed or if a sheet is not properly registered, the hook 26 will engage latch 27 for causing the tripping mechanism to function in a manner to trip the press.

Pivotally connected at 33 to an arm 34 of bracket 28 is'one end of a rod 35, the other end of which normally is in hooked relationship with a hook 36 formed ona signal member 37 mounted on shaft 38. In the hooked relation shown the rod 35 holds the signal 37 in a position to indicate normal operation and also holds a projection 39 out of locking relationship with respect to a normally oscillating arm 40 against the tension of a spring 41, one end of which is connected tothe signal member 37 and the other end of which is connected to a frame part 42. The arm 40 is secured to a shaft 43, as is also a second arm 44, to which one end of a link 45 is pivotally connected, the other end of the linkbeing pivotally connected to one arm 46 of a bell crank lever pivotally connected at 47, the other arm 48 of the bell crank lever having a roller 49 cooperating with a revolving cam 50 having a single depression 51 in its periphery into which, during normal operation of the machine, the roller 49 is pressed for each revolution of the cam 50, the roller normally being held in engagement with the cam 50 by a coiled spring 52, one end being fastened to arm 46, the other fastened to the frame. A link 53 is operatively connected to a pivotally mounted guide arm 54 which is in turn pivotally connected to a link 55 also'pivotally connected to thearm 44. The rod 53 is connectedto an arm 56 pivotally connected at 57 to one arm 58 of a bell crank lever 59, the arm 56 having formed thereon a projection 56a adapted, under abnormal registering conditions, to remain in the path of movement of a hook 60 mounted on the journal 61 of the impression cylinder 1.3 for transmitting' a tripping movement to t-he cylinder 12 in a manner hereinafter to be. described. The other arm 62 of bell crank lever 59 is pivotally connected at 63 to one4 end of a link 64, the other end of which is pivoted to one arm 65 of a bell crank 66, the other arm of which is provided with a latch 67 normally for holding a trip pedal 68 in an untripped position. The lever 68 is pivotally mounted at 69 and at one end 'is operatively connected through its normal operation.

a link 70" to the main control trip lever 15 which, as mentioned heretofore, is connected to the blanket cylinder 12 in any suitable manner, such as disclosed in one of the aforesaid patents.

In connection with the operation of the machine, it Will be understood that if a sheet is fed and properly registered with respect to the front guides 19, the hook 26 on finger 23 will not pass into engagement with the latch 27 during a rotative movement of the arm 16, and accordingly the press will not be tripped but will continue However, if a sheet is not properly registered, 0r if no sheet at all is fed, the hook 26 will pass into engage-- ment with the latch 27 during rotative movement of the arm 16, withdrawing, against the tension of spring 71, the free end of the rod 35 out of locking engagement with the projection 36, spring 41 thereby moving projection 39 into locking engagement with the arm 40 on shaft 43, thereby holding the roller 49 out of the depression 51 of cam 50 and thereby preventing the projection 56*1 on arm 56 from swinging out of the path of movement of the hook 60 and thereby through the actuation of the arm 56 through the hook 60, the bell crank lever 59 is operated for in turn withdrawing the latch 67 out of operative engagement with trip pedal 68, whereupon compressed spring 72 forces the tripping control lever 15 to move downwardly for tripping the press, or, in other words, tripping the blanket cylinder l2 out of engagement with the plate cylinder 11 and impression cylinder 13 so that no sheet will then receive an impression. Also the suction to the suction sheet feeder, not shown, will be cut off as a result of a connection from a valve\rod 73 through bell crank lever 74 and link 75 to trip pedal 68. By means of this mechanism the tripping of the press is accurately and efficiently controlled in accordance with feeding conditions of the press and also registering conditions of the sheets, and at the same time the particular signal member 37 associated with the detector finger 20, which causes the interruption in the operation of the press, indicates at what point there is faulty registration. In this way correction is greatly facilitated without loss of time in locating the difficulty.

While there are various parts affected in the registering and tripping operations, the latch 67 may be considered the main tripping means and the register means includes detect-or linger 20. The means for controlling the operation of the tripping means 67, signal means 37 and suction valve operating rod 73, may be considered the hooked mem- 'ber 23 which cooperates with latch'27 and which is responsive to movements of detector nger 20.

It is our intention to cover all.modifica' tions of the invention falling Within the spirit and scope of the following claims.

We cla-im:

1. In a printing press, the combination of sheet registering means including a movably mounted member movable in accordance with sheet registering conditions, means for tripping the press, signal means, and means carried with said movably mounted member forming a mechanical actuating connection for causing the operation of the signal means and the operation of sai-d tripping means in accordance with sheet registering conditions.

2. In a printing press, the combination of sheet registering means including a movably mounted member movable in accordance with sheet registering conditions, means for tripping the press, signal means, means associated With said movably mounted member for controlling the operation of the signal means and the operation of said tripping means in accordance with sheet registering conditions, and means for preventing fur ther supply of sheets when. the press ,is

tripped. v

3. In a printing press, a pivotally mounted latch member, a revolubly mounted. arm, a sheet register detector finger carried by said arm and movable relatively to said arm in accordance with sheet registering conditions, and a member movable in accordance finger and adapted to escape said latch if Sheet registering conditions are normal and /to engage said latch Ito trip' the press if sheet registering conditions are abnormal.

5. In a printing press, the combination of a stationary bracket, a latch member pivotally mounted thereon, signal means, a revolubly mounted arm, a guide plate secured to said arm a sheet detector finger movably mounted on said arm, and cooperating with said guide plate, and a hook member movable 1n accordance With movement of said detector finger and adapted to escape said latch if sheet registering conditions are normal and to engage said latch to actuate the signal and trip the press if sheet registering conditions are abnormal.

` Signed at Chicago, Illinois, this 4th day of January, 1922.

JOSEPH R. BLAINE.. CARL HENDERSON. 

